Patents by Inventor Fabrizio De Nisi

Fabrizio De Nisi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and circuit for a voltage supply for real time clock circuitry based on voltage regulated charge pump
    Patent number: 7550954
    Abstract: A versatile voltage regulator accommodates either an Alkaline or Lithium-Ion battery main battery and provides low-current power for a real time clock module and for charging a backup battery. Depending upon the battery power source that is used, the present invention provides a best circuit configuration for efficient power conversion. If the power converter according to the present invention provides a regulated output voltage that is greater than the main battery voltage of an Alkaline battery, a low drop-out-voltage (LDO) voltage regulator is used in feedback loop with a charge pump. Otherwise, for a Lithium-Ion battery, only a LDO voltage regulator is used. The voltage regulator includes a series low drop-out-voltage (LDO) voltage regulator that is coupled between the main external battery and the vout load terminal, when the voltage at the vout load terminal is less than the voltage of the main external battery.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: June 23, 2009
    Assignee: Atmel Corporation
    Inventors: Fabrizio De Nisi, Gian Marco Bo
  • METHOD AND CIRCUIT FOR A VOLTAGE SUPPLY FOR REAL TIME CLOCK CIRCUITRY BASED ON VOLTAGE REGULATED CHARGE PUMP
    Publication number: 20070252564
    Abstract: A versatile voltage regulator accommodates either an Alkaline or Lithium-Ion battery main battery and provides low-current power for a real time clock module and for charging a backup battery. Depending upon the battery power source that is used, the present invention provides a best circuit configuration for efficient power conversion. If the power converter according to the present invention provides a regulated output voltage that is greater than the main battery voltage of an Alkaline battery, a low drop-out-voltage (LDO) voltage regulator is used in feedback loop with a charge pump. Otherwise, for a Lithium-Ion battery, only a LDO voltage regulator is used. The voltage regulator includes a series low drop-out-voltage (LDO) voltage regulator that is coupled between the main external battery and the vout load terminal, when the voltage at the vout load terminal is less than the voltage of the main external battery.
    Type: Application
    Filed: August 15, 2006
    Publication date: November 1, 2007
    Applicant: ATMEL CORPORATION
    Inventors: Fabrizio De Nisi, Gian Marco Bo